Doesn't that island or did at one time, have something to do with anthrax?
If so, I only know this from 'Silence of the Lambs', and this of course could
be complete misinformation.
<<I got to see the beach plum thickets on Plum Island, off the tip of Long Island, NY last year - but it was mid-November, and our escort was not inclined to let me scramble around looking for pits. Don't know if they'd have knowingly let me bring them off the island or not if I had managed to scrounge any. >>
Chris Mauchline SE PA, zone 6 40° 5' N 75° 51'W ~650 ft elevation